So I really enjoyed Cole's Immortals After Dark series and was wondering if anyone had other series that had similar vibes? Witty, contemporary, old myth references, but not just your basic werewolves and vampires. Don't get me wrong, I love a good werewolf and vampire in my romance, but there's just so many sometimes.
Two of Dana Marie Bell's series come to mind immediately.
Her True Destiny series is a modern look at the Norse mythos and we find out the truth beyond those old myths. Currently there are five books - 2 MF, 2 MMF and 1 MM with at least one more in the works. I highly recommend this if you're open to other than straight MF books.
In her Gray Court series she explores the myths behind the British concepts of the fairy world - Oberon, Titania, Puck, etc. in a modern context. I'll be honest here: the first book in the series is definitely the weakest but once you get beyond that the books are all excellent. Most of the six book series is MF but the 2nd one is MMF.
Dennis McKiernan did a fantastic non-romance fairy tales mash-up series back in the early 2000's called Once upon a... First book is Once Upon a Winter's Night, then Once Upon a Summer Morn, etc. Autumn Eve, Spring Morn, and Dreadful Time. Definitely worth a look there - these take place in an alternate world where Faery can be reached from mortal Earth.
If you don't mind Young Adult, then K M Shea's My Life at the Magical Being's Rehabalitation Center and the two follow-ups are great light reading. The books take place in Chicago and deal with mythological beings learning to adapt to modern mortal culture.
There's also Terry Spear's World of the Fae series along those same YA lines. I believe she's at seven books in the series now. Those are slightly darker and deal with the various sects of the fae and how they interact with mortals (without the mortals knowing, of course).
Patricia C. Wrede's Enchanted Forest Chronicles is a sort of spoof on the traditional fairytales and is wonderfully funny for both adults and kids who are tired of the same old fairy tales. There's four books plus some short stories and all take place in a fantasy world.
Lastly, if you'd like more of a historical vibe, try Minda Webber's trilogy The Reinvented Miss Bluebeard, The Reluctant Miss Van Helsing, and The Remarkable Miss Frankenstein. These aren't truly steampunk but they do take place in an alternate magic-laced Victorian England where their families' stories are real.
I hope you find something that interests you.
Oh, btw, if you want a different take on vampires, try Lynsay Sands' Argeneau series where the "vamps" are actually descended from survivors from Atlantis. Sands has a very deft way of weaving humor into her books and with 24 out already, there's plenty to choose from.